Men working in engine room of Royal Navy warship.
Unused / unissued material - dates and locations unclear or unknown.
Inside engine rooms of Royal Navy warship. Various shots men adjusting machinery in boiler room. Officers enter and inspect their work. We see them reading instruments and dials. We see them putting on balaclavas - could be fire proof protection hood or just because they are cold? A Naval rating shows an officer a test tube. Officer looks at it and nods. Various shots of shells / torpedoes being loaded into gun barrel using mechanical grabber.